a meeting of minds
US /ə ˈmiːtɪŋ əv maɪndz/
UK /ə ˈmiːtɪŋ əv maɪndz/

1.
an agreement or shared understanding between two or more people
:
•
After a long discussion, we finally reached a meeting of minds on the project.
•
For a contract to be valid, there must be a meeting of minds between the parties.